Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liability	$ 90		$ 90			$ 217
Operating lease liability, non-current	918		918			0
Operating lease right-of-use asset	984		984			$ 217
Rent expense	100	$ 100	200
Operating lease amortization	$ 100	$ 100	$ 200	$ 200
Office Space Lease Expiring December 31, 2024
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, discount rate (as a percent)	13.00%		13.00%
Operating lease, remaining term	4 years 6 months
Office Space Lease Expiring July 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, discount rate (as a percent)					13.00%
Operating lease, remaining term			1 year
ASU 2016-02 | Office Space Lease Expiring December 31, 2024
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liability	$ 100		$ 100
Operating lease liability, non-current	900		900
Operating lease right-of-use asset	$ 1,000		$ 1,000
ASU 2016-02 | Office Space Lease Expiring July 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liability							$ 400
Operating lease liability, non-current							200
Operating lease right-of-use asset							$ 600